Rockford Fosgate 2500.1bdcp, questions.

[rhempz01]

Drive

 

[rhempz01]

After looking at all the drive wave forms, and touching up the solder for transformer, and capacitors. i attempted to b+ the amplifier with 1 mosfet per bank. Smoke came from a cracked diode d107 labeled 81H

 

[Perry Babin]

You can't tell anything much about the drive signal on AC coupling. Switch to DC. The FETs need to be in the circuit or there needs to be a load, in place of the FETs.

81H is a 33v Zener. It's not critical and can be removed for testing.

 

[rhempz01]

Dc drive signal

 

[rhempz01]

I have one fet in each bank as of now.

 

[Perry Babin]

Is the scope amplitude off by a factor of 10? It appears to be just under 1v when it should be about 10v.

 

[rhempz01]

Beacuse these drivers. Do you know which drivers go where in this area? They burnt from either something i did or before?

 

[Perry Babin]

This is the best I have.

 

[rhempz01]

Thats perfect perry.

 

[rhempz01]

Q103 on the back side of the driver card? 1A?

 

[Perry Babin]

Yes.

The one positive (front) and the two negative pins (rear) are all that's necessary to see if the card has output. See attached.

 

[rhempz01]

Perry despite changing all the drivers the drive signal is still only 1.48v and 2.44v

 

[rhempz01]

Drive 1

 

[Perry Babin]

What's the waveform on the output of the driver IC?

 

[rhempz01]

Drive 2

 

[Perry Babin]

Is that from one of the output terminals of the 3526?

 

[rhempz01]

Probe sliped and the drive stopped when checking. Im letting the rail caps discharge to see if the chip comes back on

 

[rhempz01]

From the ic output

 

[rhempz01]

Ic output 2

 

[Perry Babin]

Do you have a good drive signal on the header of the driver board?